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Spectroscopic Identification of Disordered Molecular Cations in Defect Perovskite‐like A\(Ln\)(HCO\(_2\))(C\(_2\)O\(_4\))\(_{1.5}\) (\(Ln\) = Tb‐Er) Phases

Burley, Lydia G., Srivastava, Anant Kumar, Rudić, Svemir, Saines, Paul J. (2021) Spectroscopic Identification of Disordered Molecular Cations in Defect Perovskite‐like A\(Ln\)(HCO\(_2\))(C\(_2\)O\(_4\))\(_{1.5}\) (\(Ln\) = Tb‐Er) Phases. European Journal of Inorganic Chemistry, . ISSN 1434-1948. E-ISSN 1099-0682. (doi:10.1002/ejic.202100591) (KAR id:89618)

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Official URL
https://doi.org/10.1002/ejic.202100591

Abstract

This work reports a new series of A\(Ln\)(HCO\(_2\))(C\(_2\)O\(_4\))\(_{1.5}\) (A = [(CH\(_3\))\(_2\)NH\(_2\)]\(^+\) and Ln\(^{3+}\) = Tb\(^{3+}\)-Er\(^{3+}\)) compounds made solvothermally. These \({Cmce}\) phases combine monovalent and divalent ligands, which enables a scarce combination of A\(^+\) and B\(^{3+}\) cations in a hybrid perovskite-like compound. The ratio of ligands leads to ordered anion vacancies, which alternate with oxalate linkers along the \(c\)-axis. The A-site cations are disordered and cannot be identified crystallographically, likely a result of the larger pores of these frameworks compared to the recently reported AEr(HCO\(_2\))\(_2\)(C\(_2\)O\(_4\)) phases. Neutron and infrared spectroscopy, supported by elemental composition, enables these cations to be identified as [(CH\(_3\))\(_2\)NH\(_2\)]\(^+\) molecules. Magnetic property measurements suggest these materials have weak antiferromagnetic interactions but remain paramagnetic to 1.8 K.

Item Type: Article
DOI/Identification number: 10.1002/ejic.202100591
Subjects: Q Science > QD Chemistry
Divisions: Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User: Paul Saines
Date Deposited: 04 Aug 2021 11:02 UTC
Last Modified: 04 Aug 2021 14:09 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/89618 (The current URI for this page, for reference purposes)
Saines, Paul J.: https://orcid.org/0000-0002-4207-2112
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